High-efficiency aqueous-solution-processed hybrid solar cells based on P3HT dots and CdTe nanocrystals

ACS Applied Materials & Interfaces
Shiyu YaoWenjing Tian

Abstract

Without using any environmentally hazardous organic solution, we fabricated hybrid solar cells (HSCs) based on the aqueous-solution-processed poly(3-hexylthiophene) (P3HT) dots and CdTe nanocrystals (NCs). As a novel aqueous donor material, the P3HT dots are prepared through a reprecipitation method and present an average diameter of 2.09 nm. When the P3HT dots are mixed with the aqueous CdTe NCs, the dependence of the device performance on the donor-acceptor ratio shows that the optimized ratio is 1:24. Specifically, the dependence of the device performance on the active-layer thermal annealing conditions is investigated. As a result, the optimized annealing temperature is 265 °C, and the incorporation of P3HT dots as donor materials successfully reduced the annealing time from 1 h to 10 min. In addition, the transmission electron microscopy and atomic force microscopy measurements demonstrate that the size of the CdTe NCs increased as the annealing time increased, and the annealing process facilitates the formation of a smoother interpenetrating network in the active layer. Therefore, charge separation and transport in the P3HT dots:CdTe NCs layer are more efficient. Eventually, the P3HT dots:CdTe NCs solar cells achieved 4.3...Continue Reading

References

Mar 30, 2002·Science·Wendy U HuynhA Paul Alivisatos
Dec 22, 2007·Journal of the American Chemical Society·Nicolas BlouinMario Leclerc
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Jan 12, 2013·Angewandte Chemie·Changfeng Wu, Daniel T Chiu

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